Question
Question: A real image of a distant object is formed by a planoconvex lens on its principle axis. Spherical ab...
A real image of a distant object is formed by a planoconvex lens on its principle axis. Spherical aberration is :
A
Absent
B
Smaller, if the curved surface of the lens face the object.
C
Smaller, if the plane surface of the lens faces the object.
D
Same, whichever side of the lens faces the object.
Answer
Smaller, if the curved surface of the lens face the object.
Explanation
Solution
: When the curved surface of the lens faces the object, the spherical aberration is smaller. The total deviation is shared between the curved and the plane surfaces.